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JAMES is.` .fr-Hoer', v4or WAR'RENSVILLn. euro.v

` Letters Patent No. 75,818, dated March 24, 1868.

- ,IMPROVEMBNTIN WOODFBOItING MACHINES'.

dit rlgetnle' referat `it it ttm tiftst @aiutati mating part mi 111e smut.

TO ALL WHOM IT MAY CONCERN:

Be it known that I, JAMES B. THOR?, of Warrens'ville, in the county oi Cuyahoga, and State of Ohio, have invented certain new and useful Improvements in Boring-Machines; and I do hereby declare that the following is a full and complete description of the same, reference being had tothe accompanying drawings, making a partof this specification, in whieh' A Figure vl. is a top view of the machine.

Figure 2 is a side elevation. y

Figure 3 is an end view.

Figure 4 is a transverse section.

Like letters of reference refer to like part's inthe views. n

In iig.`2, A represents aframe, consisting of the parallel sides B, iig. 1, connected to the ends C, iig. 3, and braced by the bar or guide D. E, gfll, is an eccentric-bush, fitted between the cheek-s of the sides B, and along which it is made to slide, as and for a purpose hereafter shown. On the upper e'nd of the bush is cut a screw, to which is tted a nut, F, by 'which the bush Vis secured at any point along the frame. The lower end of the bush is provided with projecting shoulders, G. Said shoulders are fitted in rabbets cut along the lower inner edge of the sides, whereby the bush is prevented from turning around between the sides, and from being' 'drawn upward by the screwing down ofthe nut. H is a shaft, to the lower end of which is an auger, I, and which is operated by the. crankJ in the following manner;

The apparatusiis placed upon the timber to be bored, and secured to the same bythe stay-rods K, lthe lower ends of which are driven into the timber, as shown in fig-3, in which K represents the timber ou which the lnnachine is placed. Should it be required to bore ajseries of holes ina right'line with the length of the timber, -and at u ,crtain uniform distance from n heedge,'the m`achine is so placed as to bring the guide D parallel to the line of boring, and at such n distance from it as to ,bring'th'e point of the auger on the linef' In this position themachine vis-seeu-reid to the' timber by the stays referred to, and which is further secured by the points a in the foot of 'the vends C; The number of holes, onbeing bored, which may be supposedto be inch holes, and in the line. ar,lig. 5, another l range of holes'rnay be bored parallel to them without shifting the machine, by simply loosening thse`nut vI1` andi then turning the eccentric-bush between the cheeks of the sides, which will bring'the auger liii-,diri btob or c, according tothe distance required to bore the second range of holes. By this means any number'ofzholes'can be bored in exact range with each other, and at' any required distancia-by moving along the bush from point to point, `as the distance 'of the holes from each other may. require, thereby saving the time andtrouble of'drawing several lines, and marking each point-where the holesare to be, bored, 'as the bard) serves as aguide fer 'the direction of the work. n

It will be obvious that diii'erent-sized angers may be used in this machine, by simply changing or turning around the hush to one `side of the parallel sides B, to the' other, more orA less, according to the'sizeiof the auger. By this movement of the bush, holesY may be bored transversely-across the timber, for mortises, dto.

Byelevating' one end ofthe sidesB, vholes may be bored oblquely into the timber, and at any desired angle.

Any of the angers in common use can be used in this machine, it being only necessary to remove the handle and insert the shaft in the eccentricLbush, 'and o peratethe' same by the crank J. I

What'I claim as my improvement, and desire tovsecure by'Le'tt'ers Patent, is-

The eccentric-bushE, carrying the shaft of the auger, soV constructed and arranged that it can be revolved within ,the nut F and clamped in any desired' position, substantially in themanner and'for the purpose set forth.

,A l JAMES B. THORP., Witnesses:

f W..H. BURR'Ines',

J. Homme. 

